Quote:
Originally Posted by ApS
On sunny days—those known for three days of gale force winds—the upper surface of our dock boards (built 1983) never get wet. However, any weekend of over-sized boat wakes will inconsiderately soak our dock— even to a condition of hazardous green and slippery saturation.

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Wouldn't rain do the same thing? Have you considered scrubbing the slime off with a stiff bristle brush? Seem like it would be less work than trying keep an outdoor dock dry.